memcache

Optimized for high concurrency and fast in-memory operations, as highlighted in the key features for handling large volumes of requests in distributed systems.

Designed from the ground up for deployment across multiple servers, making it ideal for scalable web applications without complex client-side logic.

Uses a straightforward protocol that's easy to integrate, with optional TLS support for secure connections, as mentioned in the dependencies and build options.

Supports mlockall to prevent swapping, ensuring cache performance isn't degraded by disk I/O, though the README warns it can be dangerous with large caches.